Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d34d87efb7cffea…

MALICIOUS

PDF

84.6 KB Created: 2021-07-06 20:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6adde9ab063bc3faed8a06535d68a3fb SHA-1: 00c3b9e8948c6ec20464e49f2f6b19473eb0a86c SHA-256: 7d34d87efb7cffead7380f04514121ca4f2b7a8b6ff45284ae697094b9806bad
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting. This structure is characteristic of a link farm, likely intended to host phishing pages or distribute malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2555

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zemiigori.com/uploads/file/74989386725.pdf In PDF document text
    • http://esoftland.com/userfiles/file/418735995.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/869811e291aa1a376d8004691900a7ce/wipakiwasosigu.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af4a341a231---29235077218.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0296f31b84---kefurabejujutege.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210508130903.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/jitodudexagirekik.pdfIn PDF document text
    • https://chp-travel.ir/data/file/20484823641.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c243524a1f6---74094318902.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/559bd5c125027f187ecbb9437e0fdd6b/45257103234.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094add7a37ed---49770789159.pdfIn PDF document text
    • http://stasta.com/userfiles/file/34990240571.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/wuloxikexafoko.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070530e3d559---10576318265.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4c1accd38---tumotuvaselameza.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/7e927092db0c3a86af1be8da83043646/20093762991.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/dogomogibarutoburubuwa.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce98af01df---38486597252.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/jigusuderujepimaledo.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/ruxobogo.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/0675fae3fad879dbd01b9ac250e5ea2e/mijinexozukidaxova.pdfIn PDF document text
    • http://montrealinkwell.com/clients/c/c4/c478fb9048b4d856ed1aa16e2301f982/File/19236236748.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/eb340f3be5414c774d090fd51e377ba5/78659217602.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cfb1644a049dc31baba15d6279fceb16/75468620477.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/vabavajuzawusitexiwud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cabbage+gas+reliefPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 10240 bytes
SHA-256: 195ea186bb8b20ad054587e4a812a91d8f3acc03e16c1c3c4dd6e6b2ef331f12